/**
 * Options for speech synthesis
 */
export interface SpeakOptions {
    /**
     * Speech rate
     */
    rate?: "x-slow" | "slow" | "medium" | "fast" | "x-fast";
    /**
     * Speech pitch
     */
    pitch?: "x-low" | "low" | "medium" | "high" | "x-high";
    /**
     * Speech volume (0-100)
     */
    volume?: number;
    /**
     * Output audio format
     */
    format?: "mp3" | "wav";
    /**
     * Whether to convert input from SpeechMarkdown to SSML before processing
     */
    useSpeechMarkdown?: boolean;
    /**
     * Whether to use word boundary information for streaming synthesis
     */
    useWordBoundary?: boolean;
    /**
     * Path to save the audio output
     */
    outputPath?: string;
    /**
     * Voice ID to use for synthesis
     */
    voice?: string;
}
/**
 * Unified voice format across all providers
 */
export type UnifiedVoice = {
    /**
     * Unique identifier for the voice
     */
    id: string;
    /**
     * Display name of the voice
     */
    name: string;
    /**
     * Gender of the voice
     */
    gender?: "Male" | "Female" | "Unknown";
    /**
     * TTS provider
     */
    provider: "azure" | "google" | "ibm" | "elevenlabs" | "polly" | "witai" | "playht" | "openai" | "sherpa" | "sherpaonnx" | "sherpaonnx-wasm";
    /**
     * Language codes supported by this voice
     */
    languageCodes: {
        /**
         * BCP-47 language code (e.g., 'en-US')
         */
        bcp47: string;
        /**
         * ISO 639-3 language code (e.g., 'eng')
         */
        iso639_3: string;
        /**
         * Human-readable language name (e.g., 'English (United States)')
         */
        display: string;
    }[];
};
/**
 * Credentials for TTS providers
 * @remarks This is intentionally kept as a generic object type to allow different credential formats for different providers
 */
export type TTSCredentials = Record<string, unknown>;
/**
 * Event types for TTS callbacks
 */
export type TTSEventType = "start" | "end" | "boundary";
/**
 * Callback function for word boundary events
 */
export type WordBoundaryCallback = (word: string, startTime: number, endTime: number) => void;
/**
 * Simple callback function with no parameters
 */
export type SimpleCallback = () => void;
/**
 * Property type for TTS properties
 */
export type PropertyType = string | number | null;